The formula C8H18 of octane, the eighth member of the alkane. There are 18 isomers (22 if stereoisomers are included). One of these isomers,2, 2, 4-trimethylpentane, has a low knock rate when used as gasoline engine fuel and is therefore rated as the 100 octane rating. The 18 isomers are: n-octane; 2-methylheptane; 3-methylheptane; 4-methyl heptane; 2, 2-dimethylhexane; 3, 3-dimethylhexane; 3-ethylhexane; 2, 3-dimethylhexane; 2, 4-dimethylhexane; 2, 5-dimethylhexane; 3, 4-dimethylhexane; 2,3, 4-trimethylpentane; 2,2, 3-trimethylpentane; 2,2, 4-trimethylpentane; 2,3, 3-trimethylpentane; 2-methyl-3-ethylpentane; 3-methyl-3-ethylpentane; 2,2,3, 3-tetramethylbutane.

Basic Information

Name: n-octane/octane

CAS No. : 111-65-9

Molecular formula: C8H18

Physical and chemical properties

Appearance and properties: transparent colorless liquid

Purity: content more than 99%

Density: 0.703 g/mL at 25 °C(lit.)

Melting point: −57 °C(lit.)

Boiling point: 125-127 °C(lit.)

Flash point: 60 °F

Refractive index: n20/D 1.398(lit.)

Water solubility: 0.0007g /L (20 ºC)

Storage conditions: Low temperature ventilation and dry warehouse, anti-flame, spark, friction, and oxidant separate storage

Use of product

N-octane is one of the components of industrial gasoline and can also be used as solvent and raw material for organic synthesis.

Storage and transportation

Packing, storage and transportation: ISO TANK: 24m3  TANK CAR: 58m3. Storage should be placed in a dry and cool place, the warehouse should be ventilated, avoid contact with water to prevent hydrolysis. The transportation shall comply with the state regulations on the transportation of hazardous chemicals by road and railway.